Thread: Ir cut filter when no nd is needed?

Results 1 to 6 of 6
  1. #1 Ir cut filter when no nd is needed? 
    Is it mandatory to use a clear(non-nd) IR cut filter when nd filtration is not needed?
    I'm using a whole set of Tiffen IRND's but I don't know If i need to put a IR cult filter when the nd's aren't needed.
    Reply With Quote  
     

  2. #2  
    Senior Member
    Join Date
    Aug 2014
    Posts
    1,520
    I always leave my IR Cut filter on with or without NDs when I am shooting outside in daylight.
    Reply With Quote  
     

  3. #3  
    Senior Member Tomas Stacewicz's Avatar
    Join Date
    Nov 2016
    Location
    Sweden
    Posts
    290
    I have often seen reviews of the Blackmagic Pocket Cinema Camera stating that a IR filter is a must. What is the issue with the BMPCC (and its family of cameras) and IR filters? Can anyone explain it for me?
    https://guerillafilmsoldier.wordpress.com/

    Camera
    Blackmagic Pocket Cinema Camera
    Zenit Meteor 5-1 f/1.9 17-69mm
    LOMO 16 OKS 3-10-1 f/2.1 10 mm
    Krasnogorsk-3 pistol grip with telescopic shoulder stock
    Fancier FC-270A Tripod with FC-02H Fluid Head

    Workstation
    Windows 10 Pro
    Resolve 12.5.4.019
    ASUS X99-A
    Intel Core i7 5820K 3.3 GHz 15MB
    16GB RAM Corsair DDR4 2133MHz CL13 Vengeance
    ASUS GeForce GTX 1060 Dual OC 3GB
    Samsung 750 EVO 500GB SSD
    Seagate Desktop 2TB HDD
    Reply With Quote  
     

  4. #4  
    Senior Member
    Join Date
    May 2013
    Location
    Virginia, US
    Posts
    644
    I would recommend leaving an IR cut of some kind on the Pocket camera at all times as even without ND, there is slight IR contamination in the image. It's not bad by any means but it is there slightly. If you have a filter to compare, you'll notice some difference with and without it on.

    Put simply, IR contamination is unwanted reds in your image due to an excess of infrared light (wavelengths beyond red light). Heat is another way of thinking about it. This can be especially bad if you have black fabrics in your shot as they will render dark red or brown, instead of black. No amount of color correction in post can fix this without affecting other parts of your image, like skin tones. These effects are compounded when using regular ND filtration as they reduce the ratio of visible light to infrared light making the effects much more pronounced. This is why IRNDs are so important to have on a hot day!

    IIRC, the Hoya IR cut is the best option with the Blackmagic cameras (which have little to no IR filtration built in out of the box)...
    Reply With Quote  
     

  5. #5  
    Thanks guys.
    I'm going to purchase it!
    Reply With Quote  
     

  6. #6  
    Senior Member rick.lang's Avatar
    Join Date
    Apr 2012
    Location
    Victoria BC Canada
    Posts
    3,955
    Always leave an IR cut on the lens as in best practice to avoid a problem that can ruin a shot otherwise on occasion. It isn't always needed, but you always need to use it as a habit.
    Reply With Quote  
     

Similar Threads

  1. Replies: 62
    Last Post: 10-28-2015, 03:24 PM
  2. Replies: 4
    Last Post: 04-02-2014, 04:36 AM
  3. Help Needed: Paint "Filter" for Video
    By Nick Vega in forum Cinematography
    Replies: 7
    Last Post: 11-05-2013, 01:47 PM
  4. IR filter really needed?
    By scorsesefan in forum Lens Discussion
    Replies: 2
    Last Post: 09-07-2013, 10:19 PM
  5. Is an IR filter needed?
    By Brian@202020 in forum General Discussion
    Replies: 5
    Last Post: 07-26-2012, 07:31 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •